Diagnosing video problem
Hi all,
I've got a PowerMac G5 2.0 GHz from May, 2004. It has the original ATI Radeon 9800 Pro graphics card. I recently had to replace the logic board (with a working used one). That worked fine for months, but now I'm getting video problems. I'll get flashing vertical stripes of short horizontal bars. Sometimes it seems that if I jiggle the display connector at the computer, the screen settles down for a while, but it is not completely certain that this is cause and effect. I hooked up a TV to the DVI port (using Apple's DVI-Video adaptor) and got the same issues, so it's not the display or the cable. I'm hoping that it's a graphics card problem, and not the "new" logic board. Is there a troubleshooting procedure, short of buying and trying a new graphics card, that would let me narrow down the problem?
Thanks for any help.
-Aron
PowerMac, Mac OS X (10.5.8), original PowerMac G5 2.0 GHz dual